one fang
post #5073121 post #5070600 post #5061389
A character with a single visible canine tooth — in many cases, this is the only tooth visible even with the character's mouth open — however, the character is usually assumed to have a full set of teeth that aren't depicted.
Often seen in kemono art and other anime/manga inspired art styles. "Single fangs" are typically added for the sake of cuteness, and are also frequently used to suggest mischievousness.